The BRONX — A 5-year-old was found home alone inside a filthy Bronx apartment Friday evening, police said.

Authorities were called about 6 p.m. about a boy found home alone, police said. A FedEx worker making a delivery discovered the boy when he answered the door and told the deliveryman his parents weren’t home, the NY Post reported.

When they arrived, they discovered the boy inside the apartment — filled with trash, bugs, rats and feces, the NY Post reported.